Hollow water-heating grate.



L. KAUFMAN. j HOLLOW WATER. HEATING GBATE.

.APPLIGATIOK TILED FEB. 15. 1910.

Patented Nov. 15, 1910.

Q SQXBZITB-SHEBT 1.

3mm Ludwig Kaufman L. KAUFMAN.

HOLLOW WATER HEATING GRATE.

APPLIGATIOH FILED IEB.15,1910.

Patented I-iov. 15, 2910.

2 SHEETS'SEEBT 51111011 504, Ludwig Kaufman,

mut-cages tim I Lli .State of New York, have invented certain boilersand furnaces, and the principal obstood, of course, that the essentialfeatures hen STATES PATENT OFFICE.-

LUDWIG KAUFMAN, OF NEW YORK, Y., ASSIGNCR OF ONE-HALF TO JAMES MURRAY,

or new YonK, Y.

- HOLLOW WATER-HEATING GRATE.

Specification 0! Letters Patent.

' Application filed February 15, 1910. Serial No. 543,915.

Patented Nov. 15, 1910.

To all 127mm it 11 ay concern:

Be it known that I, Lunwin Kslurnau, citixcu of the lfnitcd States,residing at, 558 W'est One Hundred and Eighty-first street, New York, inthe county of New York and new and useful Improvements in Hollowater-Hcating Grates, of which the following is a specification,reference being had therein to the accompanying drawing.

This invention relates to grates for steam ject of the same is toprovide a grate that is constructed so that a circulation of water maybe had therethrough so that said water will be heated by the grate.

In carrying out the objects of the invention generally stated above itwill be underthcreof are necessarily susce .tible of changes in detailsand structural arran ements, one preferred and practical embodi ment ofwhich is shown in the accompanying drawings, wherein Figure l is adetail perspective view of the improved grate. Fig. 2 is a fragmeirtaryvertical sectional view of the ash-pit of a stove, showing theimproved grate therein. Fig. 3 is a. transverse sectional view taken onthe line 3-3, Fig. 1. Fig.4 is a longitudinal sectional view taken onthe linc 4-l, Fig. 1.

Relerring to said drawings by nmnerals, l designates the ash-pit ofastove furnace or boiler which is provided with the usual lc es 2-2 forsupporting the grate.

-he improved waterheating grate comprises the hollow end bars 34 and thespaced apart parallel hollow bars 5 that connect said and bars 3-4..-.End bar 3 the water receiving chamber, and has a pipe communication 6with a source of cold water supply, not shown. Said chamber is refcraolyrectangular so that it will present a flat upper surface and its innerlongitudinal side is provided with a. plurality of regularly spacedapart laterally arranged outwardly projecting tubular nipples 7 whichcorr spond in number with the grate bars 5 and enter one end of the sameso that said grate bars will have a flush engagement with said chamber3. Chamber 3 in also provided with 'a plurality of pendent lugs whichcorrespond 1]] number and arrangc- 1 meat with the grate bars 5 and arefastened l to similar lugs 9 of said grate bars 5 by the bolts 10 andnut 11. Chamber 3 on its outer longitudinal side is provided with aplurality of regularly spaced apart threaded openings 12 whichcommunicate with the interior of said chamber. A plug 13 is providedforcach opening 12, said plugs being provided with a nut-shaped head llso that they may be grasped by awrench to remove said plugsfrom saidopenings.

End bar 4, which is a. receiving chamber for. the heated water from thegrate bars 5,

is of the same shape as chamber 3 and is provided witlrnipples 15 thatenter the grate bars, andwith pendent lugs 16 that are fastened to lugs17 of grate bar 5 by the bolts 18 and nut 19 in the same manner as thatdescribed in connection with chamber 3. A discharge pipe 20 extends fromchamber 3 and communicates with the usual boiler, not shown. 7 As isShow: more clearly in Fig. 3, the grate bars 5 present a tlat topsurface that is flush with the top surfaces of end chambers 3 and 4, andtheir bottom surface is narrower than their top surfaces, therebyproviding a tapering opening between the grates, which permits a gooddraft to be had through the grate, and also facilitates raking from theunderside of the grate. It will also be understood that by providing theend chambers 3-l and the grate bars 5 with .fiush flat top surfaces, thecoals are supported evenly.

As will be understood from the foregoing,

the circulation is through supply pipe 8 to cold water receiving chamber3 from which the water is distributed through bars 5- to chamber 4, andfrom chamber 4, through discharge pipe 20 to the boiler.

It is obvious that the circulation of water through the grate increasesthe life of the grate in addition to facilitating the water.

mating operation. It will also be clear that the boltand lug connectionsbetween the grate bars and the end chambers. permits said parts to benormally held in a rigid relative iosition and also permits said partsto be he d in sealed relation, yet said parts may be readily separatedwhen necessary or desirable. And further the openings of;

chamber 3, provide means whereby access may be had to the interior ofchamber 3, and as said opening almes with the openings said burs, mqans'through the grain inn-s, a vim-ding (ml m5 1M3 passed H'icrvlhruugh hrngmmc snlnrwni mm said grail burs.

What I claim as my iux'umiurl. A water hunting grzmm 2g nuliuw end(ah-Amber's, hollow gm: mmr nmnicaiing lhornwith, pmuie-mmg.- varriul bysaid chnmburs. pr-ndnm i carried by for rigidly hm- (il,hlki';1\i)i helugs in fins! relation.

mm vnmprising vmi ring s and gramour: inngnaw wars L-umzu to one cimmimgmeans for di.-, ;hnrging wawr frnm iiuni'zwr vhnmiwr and niuuzis fordctzivhzihi xiii-Ming; 11w 11:11 m \iu: chumlwrs with m Kipp-r airfaresim-rmf in flush Telniion.

in 1056mm: x nm'eof I iR'IkLHLiO; signulure in pivsvm-v of'iwo wi LUDWIGK51 \Yitmsses: Iimux J. REM. Amxxxvrr. H. Kmalxsrr.

gram inn vny'zugging \liu il iiirjil nipples of

